Stan `make test/integration/compile_models` fails on compiler warnings

the stan test suite includes model src/test/test-models/good/deprecate-increment-log-prob.stan which compiles, but generates many warnings:

Warning (non-fatal): increment_log_prob(...); is deprecated and will be removed in the future.
  Use target += ...; instead.

this is causing the integration test to fail. I don’t think anything I’ve done on my branch should change this - has anything in the makefile changed?

What do you mean by fail? Does make exit with non-zero status locally?

nevermind. cannot reproduce - most likely not running on a clean build.